Document Type : scientific research article
Authors
1
Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources
2
Fishing and Exploitation Department, College of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources,
3
Department of Marine Environmental Science, Faculty of Fisheries Sciences, Hokkaido University Fisheries Sciences
4
Department of Fisheries, Faculty of Agriculture, University of Sultan Ageng Tirtayasa, Banten, Indonesia.
5
Department of Fisheries, Faculty of Marine Science, Chabahar Maritime University
6
Gorgan University of Agricultural Sciences and Natural Resources
10.22069/japu.2022.20628.1709
Abstract
Black Pomfret (Parastromateus niger) is one of the most important commercial species along the coast of the Oman Sea. In this study, the length frequency, weight, length-girth relationship, infinite length (L_∞) and optimum length were investigated in the coastal waters of Sistan and Baluchistan. Sampling were carried out from November to December 2020. The length range of Black Pomfret was 18-45.40 cm and its optimum length was 29.6 cm. The minimum and maximum weight was 112-1900 g with a mean weight of 396.453 g in Black Pomfret. The length-weight relationship of Black Pomfret was calculated as W= 0.0094TL3.2016. The correlation coefficient (R2) was 0.9622. The results showed that the calculated value of b parameter (3.2016), which indicates the natural growth of this species in Oman Sea, is positive allometric. The total length-girth relationship of Black Pomfret was calculated as Gmax=1.0555Gg+1.7124. The correlation coefficient (R2) was 0.9247. The L_∞was estimated at 47.3 cm. The length maturity (Lm50) of Black Pomfret was calculated to be 26.6 cm, and 65% of the fish caught were immature and did not have a chance to spawn. With studies and long-term planning of these stocks and the information related to the length frequency, weight, length-weight relationships, length-girth relationships and optimum length can have a great impact on the knowledge of the stocks of these fish and reduce fishing pressure on aquatic resources such as black Pomfret in Sistan and Baluchistan province.
Keywords
Main Subjects
)